The International Maritime Organization says it will "continue its endeavors to reduce environmental impacts from international maritime transport," noting 900 new ships meet enhanced fuel efficiency standards.

Agriculture

Livestock is one of the biggest causes of global emissions

Blame the animals. As the world eats more meat and converts forests into farm land, carbon emissions will surely rise. Agriculture already accounts for about 14% of global emissions and 25% when deforestation and other land use is included, according to the Brookings Institution. It warns food production will have to increase by 50% by 2050 as populations increase.

Emissions caused by the livestock sector range from converting land to grow feed, to transporting the livestock, and particularly the methane emitted, especially from belching cattle.

But how do you slow the uptake of pork in India and beef in China, and tell Americans to eat less steak? Chatham House says nothing less than a radical shift in our eating patterns will cap agriculture emissions.